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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Microscopic - make sure not sterile - very few bulls are actually tested
seasonally polyestrous
epididymis: definition - 3 parts - 4 functions
accessory sex glands
semen evaluation (BSE)
2. Help to signal hormone levels which we need both in the brain right next to each other.
hypothalamus and pituitary gland
visual evaluation (BSE)
seasonally polyestrous
cryptorchid
3. 265-285 days
cowper's gland
Lutinizing Hormone in females
mare's estrous cycle
Dairy Cattle Gestation
4. Animal which has been castrated after puberty
sigmoid flexure
femininity of a heifer
penis and prepuce observation (BSE)
stag
5. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells
behavioral signs of estrus
organs used in spermatogenesis
rectal palpation (BSE)
ewe ovulation
6. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers
polyestrous
Size of cow in relation to the amount of milk produced
Where livelihood is in agriculture
kidney stones also called ________ ___________ can develop in the sigmoid flexure
7. Milk ~305 days - dry 60 days prior to calving
Dairy Cattle milking schedule
seminiferous tubules
Grading choice
Dairy Cattle Gestation
8. What helps regulate spermatogenesis?
elastrator
what has to happen for males for copulation to occur
testosterone
Dairy Cattle milking schedule
9. Sperm is produced here
spermatogenesis
seminiferous tubules
things to check for in a breeding soundness exam (BSE)
Dairy calves are removed from cow at birth to...
10. 114 days
dry matter and water
ewe estrus cycle
sow gestation
cow gestation
11. 114 days
polyestrous
sow gestation
hypothalamus and pituitary gland
seminiferous tubules
12. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has
libido test (BSE)
spermatogenesis
rectal palpation (BSE)
age and castration
13. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.
hypothalamus and pituitary gland
Culls bulls earlier (2 reasons)
6-8 weeks
Dairy Cattle Lactation (standard)
14. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.
semen evaluation (BSE)
feeding a high producing dairy cow
effects of estrogen
Parturition
15. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market
hormones
~1 month
reasons for castration
Sperm survival specs
16. (male) pushes the testes upward toward the body for warmth or protection
dry-off time in dairy cattle
dartos muscle
testosterone
functions of progestrone
17. 1-3 days
cow estrus cycle
feeding a high producing dairy cow
sow estrus
kidney stones also called ________ ___________ can develop in the sigmoid flexure
18. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated
reasons for castration
eminal vesicles
dry-off time in dairy cattle
burdizzo
19. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.
monestrous
Bull's fibro-elastic penis
why does the cow need fat deposits during pregnancy?
oviducts
20. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has
organs used in spermatogenesis
rectal palpation (BSE)
#1 cost in production
Culls bulls earlier (2 reasons)
21. Provide nourishment for the developing sperm
Dairy Cattle milking schedule
sertoli cells
mare's estrous cycle
sow gestation
22. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off
semen evaluation (BSE)
elastrator
functions of progestrone
Dairy Cattle Gestation
23. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.
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24. 24 hours before end of estrus cycle
ewe's estrous cycle
behavioral signs of estrus
rectal palpation (BSE)
mare ovulation
25. Start of the reproductive tract for the female. located outside of the body
seminiferous tubules
spermatogenesis
estrous
vulva
26. 26 hours after estrus begins
ewe ovulation
cow estrus cycle
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
Dairy Cattle milking schedule
27. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING
Sperm survival specs
reason for seasonal breeding periods
Dairy Cattle milking schedule
sow ovulation
28. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.
oviducts
dry-off time in dairy cattle
purpose of Breeding Soundness Exam (BSE) for males
functions of progestrone
29. 2 month growth cycle. stored in the epididymis of the bull
#1 cost in production
normal presentation of the fetus
Sperm growth rate
mare's estrous cycle
30. Duct through penis that carries sperm and urine
uterus
urethra
Holstein Cow
colostrum
31. 283 days
cow gestation
Grading choice
Avg. bull specs
penis sizes vs delivering methods
32. Front feet and head first. (except for hogs and dogs)
normal presentation of the fetus
semen evaluation (BSE)
spermatogenesis
ewe estrus
33. Days which have increasing daylight hours
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34. Parturition is controlled by...
butterfat
mare's estrous cycle
Hormones from both the fetus and the mom.
stag
35. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days
epididymis: definition - 3 parts - 4 functions
Where livelihood is in agriculture
prostate gland
spermatogenesis
36. 2 month growth cycle. stored in the epididymis of the bull
colostrum
Sperm growth rate
Dairy Cattle milking schedule
behavioral signs of estrus
37. Not under a timeline - cow can not be sold as steak
age and castration
Brown Swiss Cow
dairy cattle pregnancy check
Grading choice
38. Failure to have both testis (gonads) descend
cow estrus cycle
mare ovulation
Blood
cryptorchid
39. Implies the amount of estrogen production
visual evaluation (BSE)
femininity of a heifer
penis proper
cow estrus
40. 1-2 days
polyestrous
ewe estrus
purpose of Breeding Soundness Exam (BSE) for males
van deferens
41. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.
sertoli cells
penis sizes vs delivering methods
Sperm survival specs
oviducts
42. The more stressed out the male is - the less sperm he is going to produce
Holstein Cow
accessory sex glands
sow estrus cycle
humans: stress level vs sperm
43. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %
Jersey Cow
sow estrus cycle
penis sizes vs delivering methods
estrus
44. Failure to have one testis (gonad) to descend
mare's estrous cycle
ewe estrus
behavioral signs of estrus
monorchid
45. Birthing process (termination of gestation)
Blood
Parturition
things to check for in a breeding soundness exam (BSE)
estrus
46. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation
things to check for in a breeding soundness exam (BSE)
penis sizes vs delivering methods
mare gestation
Hormones from both the fetus and the mom.
47. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.
cow estrus
pelvis
scrotum
Bull's fibro-elastic penis
48. What about the sperm for a bull which has been castrated but still has testicles?
hypothalamus and pituitary gland
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
reasons for castration
mastitis
49. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed
functions of progestrone
cow ovulation
Follical Stimulating in males
Avg. bull specs
50. 16-20 hours
cow estrus cycle
things to check for in a breeding soundness exam (BSE)
1. more cost effective - 2. powdered milk is in excess production
cow estrus